Improvement in tubular kerosene-lanterns



1; H. sunla.

I Tubular Kerosene Lanterns. N0.I50,628. Y PatentedMay 5,1874.

UNITED STATES PATENT OFFICE..

JOHN HENRY STONE,u OF HAMILTON, CANADA.

. lIMPROVEMENT IN TUBULAR KEROSENE-LANTERNS.

Specification forming part of Letters Patent No. 150,628, dated May5,1874; application led April 1, 1872.

ple in construction, and in which effectual `means are provided forsupplying the illuminating flame with the requisite quantity of oxygento support combustion. The invention consists in the arrangement abovethe globeor chimney of the lantern of allat or horizontally enlargedair-chamber incontradistinction to a long cylinder, as heretoforeemployed, said air-chamber being located immediately over the globe, andbeing provided with aV central opening in the bottom and with a closedtop, and having downwardlyextending tubes, which are in directcommunication at their lower ends with a tubular collar or secondaryair-chamber arranged below the burner, and provided with perforations oropenings for admitting cold air, which encounters the heated or rarefiedair descending from the upper air-chamber through the tubes, and thuscreates an upward draft for supplying the burner or illuminating flamewith a large quantity of air, which is conducive to increasing thebrilliancy of the flame.

In the accompanying drawings, Figure 1 is a side elevation of a lanternconstructed according to myfin'vention. Fig. 2 is a top view, showingthe manner of holding the globe in position. y

Lanterns provided with top and bottom airchambers, and communicatingdraft or circulating air-tubes, are, as heretofore constructed,defective, for the reason that the air-chambers must be made high orlong, which increases I the size of the lantern to suchan extent as torender the same objectionable in general use, and, furthermore, in allinstances of tubular lanterns, the globe or chimney extends into theupper air-chamber, which necessitates the employment of a central tubefor the'escape of the products of combustion.

I avoid the defects or objections incidental to the ordinary tubularlanterns by making the upper air-chamber of such a size and shape aswill, in connection with a tubular or hollow base serving alsoas anoil-reservoir, tend to materially reduce the height or size of thelantern, and to render the same more compact and simple in construction.

Referring to the drawings, a designates the base or support of thelantern, which is made hollow, in order to serve as an oil-reservoir.bis a tubular collar or air chamber, located immediately above thehollow base, and having the burner g and globestand j applied thereto. cc are a series of tubes, two or more, which extend from the collar b toan air-chamber, d, located above the globe or chimney f. The tubes whichare in direct communication with the air-chamber and bottom collar serveto convey heated air'to the burner or illuminating flame, so as toproperly support combustion. The air-chamber is enlarged horizontallyand is made flat, and generally of a circular form, and is provided inits lower side with a central opening, cl, located immediately above thechimney or globe, and with a solid or closed top. The air which entersthe upper air-chamber through the opening in the bottom of the same isheated or rarefied, impinges against the top of the air chamber, and isdiverted through the tubes c to the bottom air-chamber b, where itencounters a current of cold atmospheric air entering said air chamberor collar through the perforations or openings made in the wall of thesame.

The admixture of heated and cold air in the manner set forth will createa proper downward draft in the tubes c, in order to supply theilluminating flame in a regular manner with the requisite quantity ofoxygen necessary to support combustion.

The products of combustion ascending in globe or chimney will, by reasonof thev fact that the top of the globe terminates below the air-chamberbe deflected or spread partially over the entire bottom surface of thesame, so as to draw cold air, together with a portion of the heatedgases, into the central opening d! of the air-chamber, and as the latteris highly heated, the air will be rareed or heated to such an extent asto cause the same to descend the tubes c by the suction created by thecurrent of cold air entering the openings l in the bottom chamber orcollar Z1.

The appendages of alanternforming no part of the present invention, arethe Wick-raising device h, the guard-wires z', the handle or bail l, andthe globe-fastenin g device 7c. The globe is held in place by means ofthe fastening k, which consists of a Wire soldered to the under side ofthe air-chamber and passing around the globe, as shown in Fig. 2,projecting outward on the opposite-side, so that it can be raised highenough to remove the globe.

I claim- Alantern having a horizontally-enlarged top air-chamber, d,with a central bottom opening, d', anda lower air-chamber or collar bprovided with openings Z, the communication between the two chambersbeing formed by the draft-tubes c, and the upper chamber being arrangedarranged above the top of the globe or chimney and out of Contact withthe same, as and for the purpose specified.

Dated at Hamilton, Canada, this 4th day of March, A. D. 1873.

JOHN HENRY STONE.

Signed in the presence oi` WM. BRUCE, W. B. BRUCE.

